Flush-valve.



R. W. SCHIER.

FLUSH VALVE.

APPLICATION FILED APR. 15. I916.

1L,231fi%.. Patented July 3, 1917.

oruron.

RUDOLPH W. SCHIER, OF MILWAUKEE, WISCONSIN.

FLUSH-VALVE.

Specification of Letters Patent,

Patented July 3, 19117.

Application-filed April 15, 1918. Serial No. 91,442.

To all whom it may concern:

Be it known that I, RUDOLPH W. SoHIER, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented new and useful Improvements in Flush-Valves, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

This invention relates to improvements in flush valves.

Such devices comprise main and control valves and it is one of the objects of the present invention to provide a simple construction which will enable the control valve to be readily and conveniently mounted in the housing of the main valve for compactness and appearance.

A further object is to provide a valve of a minimum number of parts adapted to be readily assembled and when assembled to be readily accessible for adjustments, etc.

Other objects and advantages of the invention will hereinafter appear.

The accompanying drawing illustrates the preferred embodiment of the invention which will now be described, it being understood-that the same is susceptible of various modifications falling within the scope of the appended claims.

In the drawing,

Figure 1 is a side elevation of the valve, and

Fig. 2 is a vertical sectional view of th valve.

The valve includes a casing 1 having an inlet port 2, an outlet port 3, an annular valve seat 4 around the latter port, a piston 5 reciprocable within said casing and having av valve 6 to fit said seat 4 to close the outlet port 3 and a push button valve 7 to con-' trol the action of said piston. The piston 5 is provided with a cup washer 8 snugly fitting the bore of the casing and said piston has a passageway 9 1O from the inlet port 2 to a counter-pressure chamber 11 of said casing. Thus as will be understood the valve 6 is seated by the pressure of the fluid in chamber 11 and is opened by the pressure of the fluid beneath tliepiston when the fluid in chamber 11 is permitted to escape through push button valve 7 by a passage 12 to the outlet 3.

Considering now in further detail the very simple construction illustrated, it will be observed that the counter pressure chamber 11 is provided by merely fitting into the bore of the casing l at a point below the upper end of passage 12, a stationary cup washer 13'. Moreover, it will be noted that this cup washer is carried by the casing 14 of the push button valve 7, which casing is fixed to the removable cap 15 of the main valve casing 1 Thus the cup washer obviates the necessity for a packed joint between the two chambers 11 and 16 or, in other words, sectional formation of the casing 1 and by the attachment of the washer to the parts noted its insertion in the casing and its removal therefrom for access to piston 5 may be quickly and easily accomplished. Also'in this connection it is to be noted that the construction described requires but a single packed joint 17, namely that for the cap 15 and that the tightening of this joint may be accomplished far more readily than would be the case if the structure required a second joint in the casing 1.

The casing 14 of the push button valve is formed of a sleeve threaded into cap 15 at 18 and bored at its lower end to receive a ball valve 19 fixed upon a rod 20 reciprocable in a bearing 21 provided in said casing. The rod 20 and ball 19 are inserted in the casing at its lower end and a cap 23 is then threaded onto the end of said casing to inclose said ball and this cap also serves to clamp the cup washer 13 against an annular flange 23 provided on said casing. The ball 19 fits an annular seat 24 provided within the casing 14 and is yieldingly held against said seat by a spring 25 surrounding the rod 20 and interposed between a knob 26 on said rod and a loose washer 27 seated upon the bearing 21. The washer 27 and its seat are tapered and under the pressure of spring 25 said washer serves as a packing about the rod 20. Between the bearing 21 and valve seat 24 the bore of the casing 14 is of materially larger diameter than the rod 20 and is connected with the exhaust chamber 16 of the main valve casing through passages 28. On the other hand, the bore of casing 14 containing the ball valve 19 is connected to the counter pressure chamber 11 of the main valve casing through passages 29 whereby said valve serves to control the passage of fluid from chamber 11 to chamber 16 as above described. In connection with the passages 29 it is to be noted that the same open directly beneath the cup washer 13 and thus preclude pocketing of air benatth said washer to any objectionable extent. Also, it is to be noted in connection with the push button valve that the same is of simple and unitary construction with all parts thereof readily accessible.

The piston 5 carrying the main valve 6 and cup washer 8 comprises a spool-like member having axial extensions 30 and 31. The lower end of the piston is shaped to receive the valve (3, comprising a tapered washer, and said washer is clamped in position by a ring 32 threaded onto extension 30. The upper end of the piston supports the cup washer 8 and said washer is clamped in position by a cylindrical member 33 threaded onto extension 31, said cylindrical member also serving as a guide for said piston in its reciproeable movements. The piston is drilled axially and radially to provide the passages t) and 10 therein. and the lower end of the axial passage is closed by a screw plug 9. Also from a point above the .radial passages S) to the lower end of the piston the axial passage is increased in diameter to facilitate drilling and to provide a trap for such sediment as may work through the passages 9.

The passages 9 and 10 in the piston lead from the inlet to the counter pressure chain-- her as above set forth and a screw threaded pin 34 is loosely fitted into the passage 10 for restricting the flow of fluid therethrough, to thereby time the closure of the valve. The pin 2H is supported by a member 35 threaded thereon and resting upon the end of piston extension 31, said piston extension having its end radially slotted to prevent obstruction by said member of the discharge from passage 10. Thus the pin requires no fixed support and the same is free for lateral play. l\[oreover the pin is subjected to the same movement longitudinally of the piston as if it were stationary for upon release of the fluid from the counter pressure chamber the pressure from below raises the pin in advance of the piston and thus relative. movement of the parts serves to keep the passage ll) clear.

The pin being raised in advance of the piston it will be apparent that the member 35 also serves as a stop for the piston. The pin is limited in its upward movement by the end of the control valve iasing and the member 35 limits the piston to the same travel as the pin. l\'[oreover the member 35 being adjustable. upon the pin provides for ready adjustment of the travel of the piston which is very advantageous for timing purposes, etc. l'pon :uljustment of member 35 the same is adapted to be secured by a lock nut 36.

From the foregoing it will be apparent that the valve (5 will. be normally closed and will be open upon depression of the push button valve. Likewise it will be apparent that the valve (3 will remain open as long as the push button is held depressed and will close when the latter is released but only after a definite lapse of time predetermined by the degree of restriction of the flow of fluid and the range of travel of the piston.

\Vhat I claim as new and desire to secure by Letters Patent is:

1. In a flush valve, in combination, a casing having inlet and outlet ports, a piston reciprocable within said casing and having a valve to control one of said ports, said casing having a bypass around said piston, a cup washer fitting the bore of said casing and fixedly mounted between said piston and the intake end of said bypass to provide a counter pressure chamber communicable with said bypass only through a pas sage in said cup washer and a valve to control said passage.

2. In a flush valve, in combination, a casing having inlet and outlet ports, a piston reciprocable within said casing and having a valve to control one of said ports, a control valve projected into one end of said casing and having a stationary'part and a cup washer surrounding said control valve and fixed to said stationary part thereof to divide said easing into counter pressure and relief chambers communicating only through said control valve, certain of said parts providing bypasses around said piston from said inlet port to said counterpressure chamber and from said relief chamber to said outlet port.

3. In a flush valve, in combination, a casing having inlet and outlet ports and a removable end cap, a piston reciprocable within said casing and having a valve for one of said ports, a control valve fixed to said casing cap for projection into said casing and a cup washer surrounding said control valve and fixed to a stationary part thereof to divide said easing into counter pressure and relief chambers communicable only through said control valve, certain of said parts providing bypasses around said piston from said inlet port to said counterpressure chamber and from said relief chamber to said outlet port.

4. In a flush valve, in combination, a casing having inlet and outlet ports and a removable end cap, a piston reciprocable within said casing and havinga valve for one of said ports, certain of said parts providing bypasses around said piston from said inlet port to one end of said casing and from the latter to said outlet port, a push button control valve having a housing fixed to said casing cap to be projected into said casing and a cup washer fixed to said housing and fitting the bore of said casing to divide the same into chambers respectively 6. In a flush valve, in combination, a casing having inlet and outlet ports, a piston reciprocable Within said casing and having a valve for one of said ports, said piston having an axial passage affording communication between said inlet port and a counter pressure part of said casing, a pin loosely fitting Within said passage and having a stop thereon to engage said piston, said pin being movable in one direction independ-' ently of said piston and a fixed stop limiting such movement of said pin and through said pin limiting corresponding movement of said piston.

7. In a flush valve, in combination, a casing having inlet and outlet ports, a piston reciprocable Within said casing and having a valve for one of said ports, said piston having an axial passage affording communication between said inlet port and a counter pressure part of said casing, a pin loosely fitting Within said passage and having thereon an adjustable stop to engage said piston, said pin being movable in one direction independently of said piston and a fixed stop limiting such movement of said pin and through said pin limiting the corresponding movement of said piston according to the adjustment of said stop on said pin.

8. In a flush valve, in combination, a casing having inlet and outlet ports, a piston reciprocable Within said casing and having a valve for one of said ports, said piston having an axial passage affording communication between said inlet port and a counter pressure part of said chamber, and a screw threaded pin loosely fitting Within said passage and having threaded thereon for ad justment a supporting stop to engage said piston, said pin being movable in one direction independently of said piston and a stop to limit such independent movement of said pin.

In Witness whereof, I have hereunto subscribed my name.

RUDULPH W. SCHIER. 

